div{
   text-align: center;
    margin-top: 200px;
}
.main{
    color: white;
    background-color: dodgerblue;
    border:none;
    margin-left:-5px;
    padding:3px;
    vertical-align: middle;
    font-family: 楷体;
}
input{

    border:1px solid cadetblue;
    padding-left: 3px;
}
.main:hover{
   background-color:blue;
}

